Watchcase-opener.



UNITED STATES DANIEL w. OAMPBELL AND PATENT OFFICE.

WATCHCASE-OPENER.

SPECIFICATION formingpart of Letters Patent No. 659049, dated October 2, 1900. Application filed November 17, 1899. Serial No. 737,344. (No model.)

To aZZ whom 't may concern.-

Be it known that we, DANIEL W. CAMP- BELL and ALBERT E. PRESCOTT, citizens of the United States, and residents of North Greek, in the county of Warren and State of New York, have invented certain new and useful Improvements in Watchcase-Openers; and we do declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of a Perspective view illustrating the invention. Fig. 2 is avertical central section.

The invention has relation to means for 'Opening the screw-cases of Watches and others having polished or otherwise finely-fini-shed exterior surfaces; and it consists in the novel construction and combination of parts, as hereinafter set forth.

The case of awatch has its front and back fitted to engage the body in the nicest inanner, and it is not easy to unscrew the parts be readily unscrewed without marring the surface of the case.

In the accompanying drawings the letter A designates the body of the instrument, which is preferably made of Wood, its end portions being cylindrical, as indicated at b. Between the end portions the body is narrowed in waist form, being annnlarly grooved, as indicated at c. The fillets dal, forming the sides of this groove, are slightly concave and join the cylindrcal portions at an obtuse angle e, designed to fit the finger-joints in gronping the end portion of the instrument in such a manner thata secure grip can be obtained. The ends of the body portions b are round and concave, as indicated at g, and as the instrument is preferably made double-that is to say, having each end adapted to engage the case--the concavities are made of different radial curvature, one being of flatter contour than the other. In this manner the instrument is designed to be applied to cases of different convex contours. Each end of the instrument is provided with a concave facing f, of rubber of about onetenth of an inch in thickness, which is firmly cemented to the concave end of the body. The outer margin m of the edge of the rubber facing presents beyond the plane of the end of the body portion and serves by its projection to prevent any harsh contact of the body portion of the instrument with the finished snrface of the watch when applied thereto. The instrument being a sort of softfaced wrench is applied by pressing the rubber-faced concave end against the convex surface of the watchcase back or front, When it will be found to engage the sui-face in a sufficiently intimate manner to serve efficiently in unscrewing the part without injury to its interiorfinish.

It is apparent that the instrument may be made single or double; but the latter is the preferred form, as the rubber facing assists the grip in operatingthe instrument.

It Will be noted that in a wrench of this p character, intended to operate upon delicate without injuring the finely-finished surface.

The Object of this invention is to provide 1 an instrument Whereby the back or front can polished surfaces, a yielding facing must be provided for contact wit-h such surfaces in order to avoid crushing or scratching the same. This yielding facing will also largely assist the grip of the wrench, for the reason that it will exclude the air, as the said facing will adapt itself to any irregularities.

Having described the invention, what we claim, and desire to secure by Letters Patent, is-

1. A wrench for Opening watchcases consisting of an unyielding body provided with a handle, and having a concave end, and a concave facing of soft rubber immovably secured upon said end, substantially as specified.

2. A case-opener, having a cylindrical end portion terminating in a concave end lined with a concave rubber facing having its margin projecting beyond the level of said concave end, substantially as specified.

3. A case-opener, consisting of the body having the cylindrical end portions, the an- IOO nnlar g'ipping-g'oove between said end porprojecting beyond the level the-eof, snbstar'- I tions, the concave ends of different curv-atialiy'a's specified. 'mire, and the rubber facngs of said concave In testimony whereof We affix our signaends, substantially as specified. tures in presence of two witnesses.

5 4. A tool for the purpose described, con- DANIEL W. CAMPBELL.

sisting of an unyielding body provided With ALBERT E. PRESCOTT. a handle, and having a concave end, and a Witnesses: eoncave soft-rubber facing immovably se- JOHN CARTER,

cured npon said end and having its nargin LUTHER C. ROGERS. 

